Abstract
In a field experiment conducted at the Łagiewniki Farm (west Poland) in the years 2015–2018, the reaction to fertilization with nitrogen (100, 160 and 220 kg N/ha) and sulfur (0, 30, 60 and 90 kg S/ha) of three forms of winter oilseed rape (WOR) (Brassica napus L.) with different quality of oil characteristics was studied. The Monolit variety with typical fatty acid composition for the double-improved cultivars, was compared with two forms with changed fatty acid composition obtained using chemically induced mutagenesis: the variety Polka—type with high oleic acid content (C18:1, 78%) and the line PN440—type with increased oleic acid content (C18:1, 75%) and reduced linolenic acid content (C18:3, 3%). The studied WOR genotypes reacted similarly to fertilization factors. A significant increase in seed yield (8%–14%, 0.26–0.4 t/ha) was visible up to the maximum nitrogen (N) dose (220 kg/ha). Sulfur fertilization increased seed yield by 4%–7% (0.15–0.22 t/ha). A significant interaction between N and S has been demonstrated. The highest seed yield at moderate N fertilization (160 kg/ha) was ensured by a 30 kg/ha S dose, while at a high N dose (220 kg/ha) the highest yield was observed at application of 60 kg S/ha. Regardless of the N dose, the highest net and marginal effectiveness of 1 kg S (about 6 kg of seeds) for all investigated forms of oilseed rape was observed at the lowest S dose (30 kg S/ha). Sulfur fertilization increased (by 3.5%–5.5%) the efficiency of the N used.
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Claims 8
Claim · model-written summary
The oilseed rape genotypes responded similarly to fertilization.
- Taxon
- winter oilseed rape
_Brassica_napus_-_Habit.jpg?width=60)
Brassica napust0 - Outcome
- reacted similarly to fertilization factorse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_Brassica_napus_-_Habit.jpg?width=500)
Verbatim
t0“winter oilseed rape”
e0“The studied WOR genotypes reacted similarly to fertilization factors”
Claim · model-written summary
Nitrogen up to 220 kg/ha significantly increased seed yield by 8%–14%.
- Taxon
- winter oilseed rapeBrassica napust0
- Treatment
- nitrogen (N) dose (220 kg/ha)e0
- Outcome
- seed yielde0
- Direction
- increasee0
- Value
- 8%–14%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“winter oilseed rape”
e0“A significant increase in seed yield (8%–14%, 0.26–0.4 t/ha) was visible up to the maximum nitrogen (N) dose (220 kg/ha)”
Claim · model-written summary
Sulfur fertilization increased seed yield by 4%–7%.
- Taxon
- winter oilseed rapeBrassica napust0
- Treatment
- Sulfur fertilizatione0
- Outcome
- seed yielde0
- Direction
- increasede0
- Value
- 4%–7%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“winter oilseed rape”
e0“Sulfur fertilization increased seed yield by 4%–7% (0.15–0.22 t/ha)”
Claim · model-written summary
Nitrogen and sulfur had a significant interaction.
- Taxon
- winter oilseed rapeBrassica napust0
- Treatment
- N and Se0
- Outcome
- interactione0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“winter oilseed rape”
e0“A significant interaction between N and S has been demonstrated”
Claim · model-written summary
At 160 kg/ha nitrogen, 30 kg/ha sulfur produced the highest seed yield.
- Taxon
- winter oilseed rapeBrassica napust0
- Treatment
- 30 kg/ha S dosee0
- Outcome
- seed yielde0
- Direction
- higheste0
- Qualifier
- moderate N fertilization (160 kg/ha)e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“winter oilseed rape”
e0“The highest seed yield at moderate N fertilization (160 kg/ha) was ensured by a 30 kg/ha S dose”
Claim · model-written summary
At 220 kg/ha nitrogen, 60 kg sulfur per hectare produced the highest seed yield.
- Taxon
- winter oilseed rapeBrassica napust0
- Treatment
- 60 kg S/hae0
- Outcome
- yielde0
- Direction
- higheste0
- Qualifier
- high N dose (220 kg/ha)e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“winter oilseed rape”
e0“at a high N dose (220 kg/ha) the highest yield was observed at application of 60 kg S/ha”
Claim · model-written summary
Across nitrogen doses, sulfur effectiveness was highest at 30 kg S/ha, at about 6 kg seeds per kg sulfur.
- Taxon
- oilseed rapeBrassica napuse0
- Treatment
- 30 kg S/hae0
- Outcome
- net and marginal effectiveness of 1 kg Se0
- Direction
- higheste0
- Value
- about 6 kg of seedse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“winter oilseed rape”
e0“Regardless of the N dose, the highest net and marginal effectiveness of 1 kg S (about 6 kg of seeds) for all investigated forms of oilseed rape was observed at the lowest S dose (30 kg S/ha)”
Claim · model-written summary
Sulfur fertilization increased nitrogen-use efficiency by 3.5%–5.5%.
- Taxon
- winter oilseed rapeBrassica napust0
- Treatment
- Sulfur fertilizatione0
- Outcome
- efficiency of the N usede0
- Direction
- increasede0
- Value
- 3.5%–5.5%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“winter oilseed rape”
e0“Sulfur fertilization increased (by 3.5%–5.5%) the efficiency of the N used”
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See all 378 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.